The population mean is the mean value of the entire population.
Contrast this with sample mean, which is the mean value of a sample of the population.
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Statistics is the study of collecting , organizing , and interpreting data!
μ is the symbol for the population mean in statistics. fyi and related but not necessary for the above answer: the sample mean is , enunciated by saying "x" bar. hope this helped. Citation : http://en.wikipedia.org/wiki/Arithmetic_mean
INFERENCES Any calculated number from a sample from the population is called a 'statistic', such as the mean or the variance.
descriptive statistics-quantitavely describe the main features of a collection of data. Descriptive statistics are distinguished from inferential.Statistics(or inductive statistics),in that descriptive statistics aim to summarize a data set,rather than use the data to learn about the population that the data are thought to represent.
Statistics: Survey of an entire population, as opposed to a sample survey.